The most common complaint of many people who've read anything by James Fell is the use (or overuse) of profanity. More importantly, the word f4ck, which in my and many other opinions, is the absolute BEST way to convey the specifics in any given story that he writes about. There simply isn't another word out there that makes sense and brings the rest of the story to life.
I've learned about many episodes in our world that I never knew about just because he writes about them. The fact that he punctuates the writing with "to the point" wording and (yes, that sometimes means profanity) keeps the reader engaged is what makes his writing work for me.
If you're at all offended by the use of coarse language, then by all means, don't bother to pick up this book, you'll likely hate everything about it. If you even get very far into it, which most detractors don't.
But...if you love to learn and keep pushing the boundaries of that learning, then this is a MUST have book. The 2nd of two, it's a cornucopia of fascinating information and I can't recommend it enough. My daughter surprised me with this second, SIGNED copy for my birthday this past year and I was just blown away. She knows me, she gets me and, she also loves James Fell!!